Viewports

26/04/08

I had to finish the drilling and tapping on a port ready to put it in.  This was the one that I made that drilling mistake on.  I messed about for ages trying to sort this out.  Eventually I used these unpronounceable “Frhei superhard” drill bits.  This piece of the viewport was diamond hard and nothing could drill it, except these.  They just drilled through it like butter. 

I also broke an ordinary HSS pilot drill into the hatch viewport and these things drilled it out no problems.  These are so good they seem to be able to drill anything.  The engineer who told me about them says that he demonstrates using them by drilling through a file.  They saved at least two viewports for me.

I have put a link on the suppliers page to where I got mine from.

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